Gets the value from the previous operation.
import Batch = require("nativescript-batch");
var b = Batch.newBatch(function(ctx) {
// ctx.prevValue = undefined
ctx.nextValue = "TM";
}).then(function(ctx) {
// ctx.prevValue = "TM"
// something that does NOT set
// ctx.nextValue property
}).then(function(ctx) {
// ctx.prevValue = undefined
ctx.nextValue = "MK";
}).then(function(ctx) {
// ctx.prevValue = "MK"
ctx.nextValue = "YS";
}).then(function(ctx) {
// ctx.prevValue = "YS"
});
b.start();